Tread portion of an automobile tire



FIG. 1 is a front view of a tread portion an automobile tire;

FIG. 2 is a perspective view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a fragmentary enlarged view showing the details of the tread portion thereof;

FIG. 5 is a cross-sectional view taken along line 5-5 in FIG. 4;

FIG. 6 is a cross-sectional view taken along line 6-6 in FIG. 4; and,

FIG. 7 is a cross-sectional view taken along line 7-7 in FIG. 4.

In the drawings, the broken lines defining the unclaimed tread region, sidewall, and the inner bead of the tire depict environmental subject matter that forms no part of the claimed design. 

The ornamental design for a tread portion of an automobile tire, as shown and described. 